Gameplay fixes

1. Fixed the "Misha is unable to get dressed on Wednesday" bug.
The fix will retroactively work on any affected saves - the chair will be usable now.

Technical fixes

1. Investigated the "yellow screen on game start" bug.
The bug is related to the Ambient Occlusion implementation on some Intel-based graphics cards.
The game now automatically disables Ambient Occlusion when it detects such devices by default.
If the problem persists, try disabling AO manually from the Options/Graphics/ menu.

2. Reduced Video RAM usage in the 'Mirror' minigames and the town map.